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/cvs/libev/ev_iouring.c
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Comparing libev/ev_iouring.c (file contents):
Revision 1.10 by root, Fri Dec 27 21:17:11 2019 UTC vs.
Revision 1.12 by root, Fri Dec 27 22:16:10 2019 UTC

… …
87/* TODO: resize cq/sq size independently */ 87/* TODO: resize cq/sq size independently */
88 88
89#include <sys/timerfd.h> 89#include <sys/timerfd.h>
90#include <sys/mman.h> 90#include <sys/mman.h>
91#include <poll.h> 91#include <poll.h>
92#include <stdint.h>
92 93
93#define IOURING_INIT_ENTRIES 32 94#define IOURING_INIT_ENTRIES 32
94 95
95/*****************************************************************************/ 96/*****************************************************************************/
96/* syscall wrapdadoop - this section has the raw api/abi definitions */ 97/* syscall wrapdadoop - this section has the raw api/abi definitions */
… …
173 __u32 resv[4]; 174 __u32 resv[4];
174 struct io_sqring_offsets sq_off; 175 struct io_sqring_offsets sq_off;
175 struct io_cqring_offsets cq_off; 176 struct io_cqring_offsets cq_off;
176}; 177};
177 178
179#define IORING_SETUP_CQSIZE 0x00000008
180
178#define IORING_OP_POLL_ADD 6 181#define IORING_OP_POLL_ADD 6
179#define IORING_OP_POLL_REMOVE 7 182#define IORING_OP_POLL_REMOVE 7
183#define IORING_OP_TIMEOUT 11
184#define IORING_OP_TIMEOUT_REMOVE 12
185
186/* relative or absolute, reference clock is CLOCK_MONOTONIC */
187struct iouring_kernel_timespec
188{
189 int64_t tv_sec;
190 long long tv_nsec;
191};
192
193#define IORING_TIMEOUT_ABS 0x00000001
180 194
181#define IORING_ENTER_GETEVENTS 0x01 195#define IORING_ENTER_GETEVENTS 0x01
182 196
183#define IORING_OFF_SQ_RING 0x00000000ULL 197#define IORING_OFF_SQ_RING 0x00000000ULL
184#define IORING_OFF_CQ_RING 0x08000000ULL 198#define IORING_OFF_CQ_RING 0x08000000ULL
185#define IORING_OFF_SQES 0x10000000ULL 199#define IORING_OFF_SQES 0x10000000ULL
186 200
187#define IORING_FEAT_SINGLE_MMAP 0x1 201#define IORING_FEAT_SINGLE_MMAP 0x00000001
188#define IORING_FEAT_NODROP 0x2 202#define IORING_FEAT_NODROP 0x00000002
189#define IORING_FEAT_SUBMIT_STABLE 0x4 203#define IORING_FEAT_SUBMIT_STABLE 0x00000004
190 204
191inline_size 205inline_size
192int 206int
193evsys_io_uring_setup (unsigned entries, struct io_uring_params *params) 207evsys_io_uring_setup (unsigned entries, struct io_uring_params *params)
194{ 208{
… …
289 iouring_tfd = -1; 303 iouring_tfd = -1;
290 iouring_sq_ring = MAP_FAILED; 304 iouring_sq_ring = MAP_FAILED;
291 iouring_cq_ring = MAP_FAILED; 305 iouring_cq_ring = MAP_FAILED;
292 iouring_sqes = MAP_FAILED; 306 iouring_sqes = MAP_FAILED;
293 307
308 if (!have_monotonic) /* cannot really happen, but what if11 */
309 return -1;
310
294 for (;;) 311 for (;;)
295 { 312 {
296 iouring_fd = evsys_io_uring_setup (iouring_entries, &params); 313 iouring_fd = evsys_io_uring_setup (iouring_entries, &params);
297 314
298 if (iouring_fd >= 0) 315 if (iouring_fd >= 0)
299 break; /* yippie */ 316 break; /* yippie */
300 317
301 if (errno != EINVAL) 318 if (errno != EINVAL)
302 return -1; /* we failed */ 319 return -1; /* we failed */
320
321#if TODO
322 if ((~params.features) & (IORING_FEAT_NODROP | IORING_FEATURE_SINGLE_MMAP))
323 return -1; /* we require the above features */
324#endif
303 325
304 /* EINVAL: lots of possible reasons, but maybe 326 /* EINVAL: lots of possible reasons, but maybe
305 * it is because we hit the unqueryable hardcoded size limit 327 * it is because we hit the unqueryable hardcoded size limit
306 */ 328 */
307 329
… …
449 if (ecb_expect_false (gen != (uint32_t)anfds [fd].egen)) 471 if (ecb_expect_false (gen != (uint32_t)anfds [fd].egen))
450 return; 472 return;
451 473
452 if (ecb_expect_false (res < 0)) 474 if (ecb_expect_false (res < 0))
453 { 475 {
454 //TODO: EINVAL handling (was something failed with this fd) 476 /*TODO: EINVAL handling (was something failed with this fd)*/
455 //TODO: EBUSY happens when? 477 /*TODO: EBUSY happens when?*/
456 478
457 if (res == -EBADF) 479 if (res == -EBADF)
458 { 480 {
459 assert (("libev: event loop rejected bad fd", res != -EBADF)); 481 assert (("libev: event loop rejected bad fd", res != -EBADF));
460 fd_kill (EV_A_ fd); 482 fd_kill (EV_A_ fd);

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